<template>
	<view class="u-wrap">
		<uni-search-bar placeholder="搜索服务" @confirm="shou"></uni-search-bar>
		<view class="u-menu-wrap">
			<view class="u-p"></view>
			<scroll-view scroll-y scroll-with-animation class="u-tab-view menu-scroll-view" :scroll-top="scrollTop"
				:scroll-into-view="itemId">
				<view v-for="(item,index) in tabbar" :key="index" class="u-tab-item"
					:class="[current == index ? 'u-tab-item-active' : '']" @tap.stop="swichMenu(index)">
					<text class="u-line-1">{{item.serviceType}}</text>
				</view>
			</scroll-view>
			<scroll-view :scroll-top="scrollRightTop" scroll-y scroll-with-animation class="right-box"
				@scroll="rightScroll">
				<view class="page-view">
					<view class="class-item" :id="'item' + index" v-for="(item , index) in tabbar" :key="index">
						<view class="item-title">
							<text>{{item.serviceType}}</text>
						</view>
						<view class="item-container">
							<view class="thumb-box" v-for="(item1, index1) in item.children" :key="index1"
								@click="dianji(item1.link,index,index1)">
								<image class="item-menu-image" :src="base+item1.imgUrl" mode=""></image>
								<view class="item-menu-name">{{item1.serviceName}}</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN9()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">智慧党建</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN8()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">时代楷模</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN7()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">智慧养老</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN6()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">精准扶贫</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN5()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">智慧社区</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN4()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">数据分析</view>
							</view>
							<view v-if="index == 2" class="thumb-box" @click="tozhiyuN3()">
								<image class="item-menu-image" src="../../../static/uview/example/js_select_bak.png"
									mode=""></image>
								<view class="item-menu-name">数据分析</view>
							</view>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>

		<uni-popup type="bottom" ref="poup">
			<view style="width: 100%; height: 300rpx;background-color: #fff;">
				<view class="item-container">
					<view class="thumb-box" v-for="(item1, index1) in shoulist" :key="index1"
						@click="dianji(item1.link)">
						<image class="item-menu-image" :src="item1.image" mode=""></image>
						<view class="item-menu-name">{{item1.text}}</view>
					</view>
				</view>
			</view>
		</uni-popup>
	</view>
</template>
<script>
	import api from 'commer/apiURL.js'
	export default {
		data() {
			return {
				shoulist: [],
				base: api.baseurl,
				scrollTop: 0, //tab标题的滚动条位置
				oldScrollTop: 0,
				current: 0, // 预设当前项的值
				menuHeight: 0, // 左边菜单的高度
				menuItemHeight: 0, // 左边菜单item的高度
				itemId: '', // 栏目右边scroll-view用于滚动的id
				tabbar: '',
				menuItemPos: [],
				arr: [],
				scrollRightTop: 0, // 右边栏目scroll-view的滚动条高度
				timer: null, // 定时器

			}
		},
		onLoad() {
			this.getquan()
		},
		onReady() {
			this.getMenuItemTop()
		},
		methods: {
			tozhiyuN3() {
				uni.navigateTo({
					url: 'shuju4'
				})
			},
			tozhiyuN4() {
				uni.navigateTo({
					url: 'shuju3'
				})
			},
			tozhiyuN5() {
				uni.navigateTo({
					url: '../zhihui5/zhihui'
				})
			},
			tozhiyuN6() {
				uni.navigateTo({
					url: '../zhihui4/zhihui'
				})
			},
			tozhiyuN7() {
				uni.navigateTo({
					url: '../zhihui2/zhihui2'
				})
			},
			tozhiyuN8() {
				uni.navigateTo({
					url: '../zhihui3/zhihui'
				})
			},
			tozhiyuN9() {
				uni.navigateTo({
					url: '../zhihui/zhihui'
				})
			},
			dianji(url, index, index2) {

				if (index == 2 && index2 == 9) {
					uni.navigateTo({
						url: 'hotline/index'
					})
					return
				}
				if (index == 0 && index2 == 7) {
					uni.navigateTo({
						url: 'shuju/shuju'
					})
					return
				}
				if (index == 2 && index2 == 6) {
					uni.navigateTo({
						url: 'qingnian/qingnian'
					})
					return
				}
				if (index == 0 && index2 == 9) {
					uni.navigateTo({
						url: 'laji/laji'
					})
					return
				}
				if (index == 2 && index2 == 10) {
					console.log('33')
					uni.navigateTo({
						url: 'zhixu/zhixu'
					})
					return
				}
				if (index == 0 && index2 == 6) {
					uni.navigateTo({
						url: 'LOVE/LOVE'
					})
					return
				}
				if (index == 2 && index2 == 5) {
					console.log('22')
					uni.navigateTo({
						url: 'wuliu/wuliu'
					})
					return
				}
				if (index == 0 && index2 == 8) {
					uni.navigateTo({
						url: 'Library/index'
					})
					return


				}
				if (index == 2 && index2 == 8) {
					uni.navigateTo({
						url: 'supportServices/index'
					})
					return
				
				
				}
				console.log(url)
				uni.navigateTo({
					url: url
				})
			},
			shou(e) {
				this.shoulist = []
				for (var i = 0; i < this.tabbar.length; i++) {
					for (var j = 0; j < this.tabbar[i].children.length; j++) {
						if (this.tabbar[i].children[j].serviceName.indexOf(e.value) >= 0) {
							this.shoulist.push({
								image: this.base + this.tabbar[i].children[j].imgUrl,
								text: this.tabbar[i].children[j].serviceName,
								link: this.tabbar[i].children[j].link
							})
						}
					}
				}
				this.$refs.poup.open()
			},
			getquan() {
				this.$get(this.base + '/prod-api/api/service/list').then((res) => {
					this.tabbar = this.arrfen(res.rows)
				})
			},
			arrfen(arr) {
				let map = {},
					list = [];
				for (var i = 0; i < arr.length; i++) {
					let item = arr[i]
					if (!map[item.serviceType]) {
						list.push({
							serviceType: item.serviceType,
							children: [item]
						})
						map[item.serviceType] = item
					} else {
						for (var j = 0; j < list.length; j++) {
							var nitem = list[j]
							if (nitem.serviceType === item.serviceType) {
								nitem.children.push(item)
							}
						}
					}
				}
				console.log(list)
				return list
			},
			// 点击左边的栏目切换
			async swichMenu(index) {
				if (this.arr.length == 0) {
					await this.getMenuItemTop();
				}
				if (index == this.current) return;
				this.scrollRightTop = this.oldScrollTop;
				this.$nextTick(function() {
					this.scrollRightTop = this.arr[index];
					this.current = index;
					this.leftMenuStatus(index);
				})
			},
			// 获取一个目标元素的高度
			getElRect(elClass, dataVal) {
				new Promise((resolve, reject) => {
					const query = uni.createSelectorQuery().in(this);
					query.select('.' + elClass).fields({
						size: true
					}, res => {
						// 如果节点尚未生成，res值为null，循环调用执行
						if (!res) {
							setTimeout(() => {
								this.getElRect(elClass);
							}, 10);
							return;
						}
						this[dataVal] = res.height;
						resolve();
					}).exec();
				})
			},
			// 观测元素相交状态
			async observer() {
				this.tabbar.map((val, index) => {
					let observer = uni.createIntersectionObserver(this);
					// 检测右边scroll-view的id为itemxx的元素与right-box的相交状态
					// 如果跟.right-box底部相交，就动态设置左边栏目的活动状态
					observer.relativeTo('.right-box', {
						top: 0
					}).observe('#item' + index, res => {
						if (res.intersectionRatio > 0) {
							let id = res.id.substring(4);
							this.leftMenuStatus(id);
						}
					})
				})
			},
			// 设置左边菜单的滚动状态
			async leftMenuStatus(index) {
				this.current = index;
				// 如果为0，意味着尚未初始化
				if (this.menuHeight == 0 || this.menuItemHeight == 0) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
					await this.getElRect('u-tab-item', 'menuItemHeight');
				}
				// 将菜单活动item垂直居中
				this.scrollTop = index * this.menuItemHeight + this.menuItemHeight / 2 - this.menuHeight / 2;
			},
			// 获取右边菜单每个item到顶部的距离
			getMenuItemTop() {
				new Promise(resolve => {
					let selectorQuery = uni.createSelectorQuery();
					selectorQuery.selectAll('.class-item').boundingClientRect((rects) => {
						// 如果节点尚未生成，rects值为[](因为用selectAll，所以返回的是数组)，循环调用执行
						if (!rects.length) {
							setTimeout(() => {
								this.getMenuItemTop();
							}, 10);
							return;
						}
						rects.forEach((rect) => {
							// 这里减去rects[0].top，是因为第一项顶部可能不是贴到导航栏(比如有个搜索框的情况)
							this.arr.push(rect.top - rects[0].top);
							resolve();
						})
					}).exec()
				})
			},
			// 右边菜单滚动
			async rightScroll(e) {
				this.oldScrollTop = e.detail.scrollTop;
				if (this.arr.length == 0) {
					await this.getMenuItemTop();
				}
				if (this.timer) return;
				if (!this.menuHeight) {
					await this.getElRect('menu-scroll-view', 'menuHeight');
				}
				setTimeout(() => { // 节流
					this.timer = null;
					// scrollHeight为右边菜单垂直中点位置
					let scrollHeight = e.detail.scrollTop + this.menuHeight / 2;
					for (let i = 0; i < this.arr.length; i++) {
						let height1 = this.arr[i];
						let height2 = this.arr[i + 1];
						// 如果不存在height2，意味着数据循环已经到了最后一个，设置左边菜单为最后一项即可
						if (!height2 || scrollHeight >= height1 && scrollHeight < height2) {
							this.leftMenuStatus(i);
							return;
						}
					}
				}, 10)
			}
		}
	}
</script>

<style lang="scss" scoped>
	.u-wrap {
		height: calc(100vh);
		/* #ifdef H5 */
		height: calc(100vh - var(--window-top));
		/* #endif */
		display: flex;
		flex-direction: column;
	}

	.u-search-box {
		padding: 18rpx 30rpx;
	}

	.u-menu-wrap {
		flex: 1;
		display: flex;
		overflow: hidden;
	}

	.u-search-inner {
		background-color: rgb(234, 234, 234);
		border-radius: 100rpx;
		display: flex;
		align-items: center;
		padding: 10rpx 16rpx;
	}

	.u-search-text {
		font-size: 26rpx;
		color: $u-tips-color;
		margin-left: 10rpx;
	}

	.u-tab-view {
		width: 200rpx;
		height: 100%;
	}

	.u-tab-item {
		height: 110rpx;
		background: #f6f6f6;
		box-sizing: border-box;
		display: flex;
		align-items: center;
		justify-content: center;
		font-size: 26rpx;
		color: #444;
		font-weight: 400;
		line-height: 1;
	}

	.u-tab-item-active {
		position: relative;
		color: #000;
		font-size: 30rpx;
		font-weight: 600;
		background: #fff;
	}

	.u-tab-item-active::before {
		content: "";
		position: absolute;
		border-left: 4px solid $u-type-primary;
		height: 32rpx;
		left: 0;
		top: 39rpx;
	}

	.u-tab-view {
		height: 100%;
	}

	.right-box {
		background-color: rgb(250, 250, 250);
	}

	.page-view {
		padding: 16rpx;
	}

	.class-item {
		margin-bottom: 30rpx;
		background-color: #fff;
		padding: 16rpx;
		border-radius: 8rpx;
	}

	.class-item:last-child {
		min-height: 100vh;
	}

	.item-title {
		font-size: 26rpx;
		color: $u-main-color;
		font-weight: bold;
	}

	.item-menu-name {
		font-weight: normal;
		font-size: 24rpx;
		color: $u-main-color;
	}

	.item-container {
		display: flex;
		flex-wrap: wrap;
	}

	.thumb-box {
		width: 33.333333%;
		display: flex;
		align-items: center;
		justify-content: center;
		flex-direction: column;
		margin-top: 20rpx;
	}

	.item-menu-image {
		width: 120rpx;
		height: 120rpx;
	}
</style>
